[heap] Unify parameter order in MoveEvent funcs

Now it's "source, target" in all places.

Change-Id: I6ce943214c79467aca4e3b62c3376921e206842a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3870917
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82940}

src/heap/heap.cc

@@ -3426,7 +3426,7 @@ bool MayContainRecordedSlots(HeapObject object) {
 }
 }  // namespace
 
-void Heap::OnMoveEvent(HeapObject target, HeapObject source,
+void Heap::OnMoveEvent(HeapObject source, HeapObject target,
                        int size_in_bytes) {
   HeapProfiler* heap_profiler = isolate_->heap_profiler();
   if (heap_profiler->is_tracking_object_moves()) {
@@ -3515,7 +3515,7 @@ FixedArrayBase Heap::LeftTrimFixedArray(FixedArrayBase object,
 
   if (isolate()->log_object_relocation()) {
     // Notify the heap profiler of change in object layout.
-    OnMoveEvent(new_object, object, new_object.Size());
+    OnMoveEvent(object, new_object, new_object.Size());
   }
 
 #ifdef ENABLE_SLOW_DCHECKS

src/heap/heap.h

@@ -784,7 +784,7 @@ class Heap {
                                         Handle<Map> map);
 
   // This event is triggered after object is moved to a new place.
-  void OnMoveEvent(HeapObject target, HeapObject source, int size_in_bytes);
+  void OnMoveEvent(HeapObject source, HeapObject target, int size_in_bytes);
 
   bool deserialization_complete() const { return deserialization_complete_; }
 

src/heap/mark-compact.cc

@@ -1663,7 +1663,7 @@ class ProfilingMigrationObserver final : public MigrationObserver {
       PROFILE(heap_->isolate(),
               CodeMoveEvent(AbstractCode::cast(src), AbstractCode::cast(dst)));
     }
-    heap_->OnMoveEvent(dst, src, size);
+    heap_->OnMoveEvent(src, dst, size);
   }
 };
 

src/heap/scavenger-inl.h

@@ -106,7 +106,7 @@ bool Scavenger::MigrateObject(Map map, HeapObject source, HeapObject target,
   }
 
   if (V8_UNLIKELY(is_logging_)) {
-    heap()->OnMoveEvent(target, source, size);
+    heap()->OnMoveEvent(source, target, size);
   }
 
   if (is_incremental_marking_ &&